<template>  
  <div class="sidebar">
    <el-menu default-active="2" class="el-menu-vertical-demo" theme="dark" unique-opened router>
      <template v-for="item in items">
        <template v-if="item.subs">
            <el-submenu :index="item.index">
                <template slot="title"><i :class="item.icon"></i>{{ item.title }}</template>
                <el-menu-item v-for="(subItem,i) in item.subs" :key="i" :index="subItem.index">{{ subItem.title }}
                </el-menu-item>
            </el-submenu>
        </template>
        <template v-else>
            <el-menu-item :index="item.index">
                <i :class="item.icon"></i>{{ item.title }}
            </el-menu-item>
        </template>
    </template>
    </el-menu>
  </div>
</template>

<script>
export default {  
  data() {
            return {
                items: [
                    {
                        icon: 'el-icon-setting',
                        index: 'readme',
                        title: '自述'
                    },
                    {
                        icon: 'el-icon-menu',
                        index: '2',
                        title: '表格',
                        subs: [
                            {
                                index: 'basetable',
                                title: '基础表格'
                            },
                            {
                                index: 'vuetable',
                                title: 'Vue表格组件'
                            }
                        ]
                    },
                    {
                        icon: 'el-icon-date',
                        index: '3',
                        title: '表单',
                        subs: [
                            {
                                index: 'baseform',
                                title: '基本表单'
                            },
                            {
                                index: 'vueeditor',
                                title: '编辑器'
                            },
                            {
                                index: 'markdown',
                                title: 'markdown'
                            },
                            {
                                index: 'upload',
                                title: '文件上传'
                            }
                        ]
                    },
                    {
                        icon: 'el-icon-star-on',
                        index: 'basecharts',
                        title: '图表'
                    },
                    {
                        icon: 'el-icon-upload2',
                        index: 'drag',
                        title: '拖拽'
                    }
                ]
            }
        }
}
</script>

<!-- Add "scoped" attribute to limit CSS to this component only -->
<style lang='less' scoped>
    .sidebar{
        display: block;
        position: absolute;
        width: 250px;        
        top: 78px;
        bottom:0;
        background: #2E363F;
    }
    .sidebar > ul {
        height:100%;
    }
</style>
